I have some questions regardings the network flows and ports. I already know that elasticsearch is using 9200 and 9300 ports.
- 9200 for the requests
- 9300 for the communication between nodes
- Which port is using elasticsearch for transferring data between nodes (example : hot to warm)
- Do we need to open the 9200 port between the nodes or it's only for the client's requests ?
- Do we need to open in two-way the 9300 ports on all nodes on the firewall ?
Thank you for your answers